CVE-2026-72120can: bcm: add missing rcu list annotations and operations

Official description

In the Linux kernel, the following vulnerability has been resolved: can: bcm: add missing rcu list annotations and operations sashiko-bot remarked the missing use of list_add_rcu() in bcm_[rx|tx]_setup() to have a proper initialized bcm_op structure when bcm_proc_show() traverses the bcm_op's under rcu_read_lock(). To cover all initial settings of the bcm_op's the list_add_rcu() calls are moved to the end of the setup code. While at it, also fix the mirroring removal side: bcm_release() called bcm_remove_op() - which frees the op via call_rcu() - on ops that were still linked in bo->tx_ops/bo->rx_ops, without list_del_rcu() first. Unlink each op with list_del_rcu() before handing it to bcm_remove_op(), matching the existing pattern in bcm_delete_tx_op()/bcm_delete_rx_op().

Affected packages & fixed versions

Affected products (as reported)

References

• https://git.kernel.org/stable/c/8357255e56dc1aaa437e3c53ee9385de984e0d57
• https://git.kernel.org/stable/c/8e1c7257c81577130f5ce90f69b2a2c3ce63f957
• https://git.kernel.org/stable/c/eb1c26eab4d1f0b4450439b4b88c3e73faf1da98
• https://git.kernel.org/stable/c/f53bdab85e64eb57d6899a30d1307fd5a3639cc7
• https://git.kernel.org/stable/c/4e22e8b505f877573bbdfdbcb680babad9b2f7a1
• https://git.kernel.org/stable/c/b06a4a397ac826603f39875cb7c7819a41365196
• https://git.kernel.org/stable/c/30f7bb922cb7e7f072a56c7cb7a5efccd2ceca1d
• https://git.kernel.org/stable/c/7b2c3eabc4dafc062a25e10711154f2107526a78